Isolate up to 1.2 mg plasmid DNA from 50-200 mL bacterial cultures using maxi spin columns. The E.Z.N.A. Plasmid DNA Maxi Kit utilizes the convenient spin-column format to deliver high-quality plasmid DNA following a simple “bind-wash-elute” procedure without need for expensive accessories. The yields vary according to plasmid copy number, E. coli strain, and growth conditions. 50-200 mL of bacterial cultures in LB medium typically produces 0.6-1.2 mg of high copy number plasmid DNA. Up to 500 mL of culture may be processed when working with low copy number plasmid. The system uses centrifugation or vacuum technology for plasmid purification and eliminates the time-consuming gravity-flow columns that require alcohol precipitation. Purified plasmid DNA is suitable for automated fluorescent DNA sequencing (typical reads exceed 800 bp), restriction enzyme digestion, ligation, PCR, in vitro transcription, transformation, and other applications.